<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>修改商品页面</h1>
    <input type="text" v-model="p.id" placeholder="id" readonly>
    <input type="text" v-model="p.title" placeholder="标题">
    <input type="text" v-model="p.price" placeholder="价格">
    <input type="text" v-model="p.num" placeholder="库存">
    <input type="button" value="修改" @click="update()">
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script>
    let v = new Vue({
        el: "body>div",
        data: {
            p: {id: 1, title: "手机", price: 2000, num: 50}
        },
        created: function () {
            //通过修改商品的id查询商品的所有信息 /selectById?id=5
            axios.get("/selectById" + location.search).then(function (response) {
                //把通过id查询到的商品对象 赋值给Vue里面的变量,页面会自动发生改变
                v.p = response.data;
            })
        },
        methods: {
            update() {
                //发出修改请求
                axios.post("/update", v.p).then(function (response) {
                    alert("修改完成");
                    location.href = "/list.html";//回到列表页面
                })
            }
        }
    })
</script>
</body>
</html>